If the previous 3 series can be used as a guide, they will have a $3000 kit which replaces air intake and exhaust, springs, software, add front and rear braces, and floor mats. (+6k for a brake change.)
I think spending 5k after a year or two to get a different level of performance is well worth it. While a 330i might not see a tremendous difference, a 325i should see a 40+ hp gain.
What I like most, is I feel I can trust Dinan. They're established, and they do serious work.
When they do a signature series conversion, I'll be there.
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